Optical variability of eight FRII-type quasars with 13 yr photometric light curves

2022
journal article
article
1
cris.lastimport.wos2024-04-10T02:07:57Z
dc.abstract.enWe characterize the optical variability properties of eight lobe-dominated radio quasars (QSOs): B2 0709+37, FBQS J095206.3+235245, PG 1004+130, [HB89] 1156+631, [HB89] 1425+267, [HB89] 1503+691, [HB89] 1721+343, and 4C +74.26, systematically monitored for a duration of 13 yr since 2009. The quasars are radio-loud objects with extended radio lobes that indicate their orientation close to the sky plane. Five of the eight QSOs are classified as giant radio quasars. All quasars showed variability during our monitoring, with magnitude variations between 0.3 and 1 mag for the least variable and the most variable QSOs, respectively. We performed both structure function (SF) analysis and power spectral density (PSD) analysis for the variability characterization and search for characteristic timescales and periodicities. As a result of our analysis, we obtained relatively steep SF slopes (α ranging from 0.49 to 0.75) that are consistent with the derived PSD slopes (∼2–3). All the PSDs show a good fit to single power-law forms, indicating a red-noise character of variability between timescales of ∼13 yr and weeks. We did not measure reliable characteristic timescales of variability from the SF analysis, which indicates that the duration of the gathered data is too short to reveal them. The absence of bends in the PSDs (change of slope from ≥1 to ∼0) on longer timescales indicates that optical variations are most likely caused by thermal instabilities in the accretion disk.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomicznepl
dc.contributor.authorKuźmicz, Agnieszka - 138530 pl
dc.contributor.authorGoyal, Arti - 348612 pl
dc.contributor.authorZoła, Stanisław - 132934 pl
dc.contributor.authorJamrozy, Marek - 128434 pl
dc.contributor.authorDróżdż, Marekpl
dc.contributor.authorOgłoza, Waldemarpl
dc.contributor.authorSiwak, Michałpl
dc.contributor.authorReichart, Daniel E.pl
dc.contributor.authorKouprianov, Vladimir V.pl
dc.contributor.authorCaton, Daniel B.pl
dc.date.accessioned2022-11-18T10:31:32Z
dc.date.available2022-11-18T10:31:32Z
dc.date.issued2022pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number1pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume263pl
dc.identifier.articleid16pl
dc.identifier.doi10.3847/1538-4365/ac9622pl
dc.identifier.eissn1538-4365pl
dc.identifier.issn0067-0049pl
dc.identifier.urihttps://ruj.uj.edu.pl/xmlui/handle/item/303840
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl*
dc.share.typeotwarte czasopismo
dc.subject.enquasarspl
dc.subject.engalaxy photometrypl
dc.subject.enactive galaxiespl
dc.subject.enradio loud quasarspl
dc.subtypeArticlepl
dc.titleOptical variability of eight FRII-type quasars with 13 yr photometric light curvespl
dc.title.journalThe Astrophysical Journal. Supplement Seriespl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-10T02:07:57Z
dc.abstract.enpl
We characterize the optical variability properties of eight lobe-dominated radio quasars (QSOs): B2 0709+37, FBQS J095206.3+235245, PG 1004+130, [HB89] 1156+631, [HB89] 1425+267, [HB89] 1503+691, [HB89] 1721+343, and 4C +74.26, systematically monitored for a duration of 13 yr since 2009. The quasars are radio-loud objects with extended radio lobes that indicate their orientation close to the sky plane. Five of the eight QSOs are classified as giant radio quasars. All quasars showed variability during our monitoring, with magnitude variations between 0.3 and 1 mag for the least variable and the most variable QSOs, respectively. We performed both structure function (SF) analysis and power spectral density (PSD) analysis for the variability characterization and search for characteristic timescales and periodicities. As a result of our analysis, we obtained relatively steep SF slopes (α ranging from 0.49 to 0.75) that are consistent with the derived PSD slopes (∼2–3). All the PSDs show a good fit to single power-law forms, indicating a red-noise character of variability between timescales of ∼13 yr and weeks. We did not measure reliable characteristic timescales of variability from the SF analysis, which indicates that the duration of the gathered data is too short to reveal them. The absence of bends in the PSDs (change of slope from ≥1 to ∼0) on longer timescales indicates that optical variations are most likely caused by thermal instabilities in the accretion disk.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne
dc.contributor.authorpl
Kuźmicz, Agnieszka - 138530
dc.contributor.authorpl
Goyal, Arti - 348612
dc.contributor.authorpl
Zoła, Stanisław - 132934
dc.contributor.authorpl
Jamrozy, Marek - 128434
dc.contributor.authorpl
Dróżdż, Marek
dc.contributor.authorpl
Ogłoza, Waldemar
dc.contributor.authorpl
Siwak, Michał
dc.contributor.authorpl
Reichart, Daniel E.
dc.contributor.authorpl
Kouprianov, Vladimir V.
dc.contributor.authorpl
Caton, Daniel B.
dc.date.accessioned
2022-11-18T10:31:32Z
dc.date.available
2022-11-18T10:31:32Z
dc.date.issuedpl
2022
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
1
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
263
dc.identifier.articleidpl
16
dc.identifier.doipl
10.3847/1538-4365/ac9622
dc.identifier.eissnpl
1538-4365
dc.identifier.issnpl
0067-0049
dc.identifier.uri
https://ruj.uj.edu.pl/xmlui/handle/item/303840
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type
otwarte czasopismo
dc.subject.enpl
quasars
dc.subject.enpl
galaxy photometry
dc.subject.enpl
active galaxies
dc.subject.enpl
radio loud quasars
dc.subtypepl
Article
dc.titlepl
Optical variability of eight FRII-type quasars with 13 yr photometric light curves
dc.title.journalpl
The Astrophysical Journal. Supplement Series
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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